<!DOCTYPE html>
<html>
<head>
    <style>
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }

        .message {
            font-size: 2em;
        }
    </style>
</head>
<body>
    <div class="message">
        权限不足，禁止访问！
    </div>
</body>
</html>
